| |||
| Null f | |||
|
zero : 28 phrases in 13 subjects |
| Analytical chemistry | 3 |
| Antennas and waveguides | 3 |
| Construction | 1 |
| Electronics | 6 |
| Energy industry | 2 |
| Forestry | 1 |
| Mathematics | 3 |
| Microsoft | 2 |
| Nuclear physics | 1 |
| Rail transport | 2 |
| Statistics | 1 |
| Surveying | 1 |
| Technology | 2 |